Grain sieve



N. G. EK.

GRAIN SIEVE.

APPLICATION FILED ssnzs, 1911.

Patented June 3, 1919.

3 SHEETS-SHEET 1.

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WITNESSES.

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u. e. EK. GRAIN SIEVE.

APPLICATION FILED SEPT. 29. I917.

Patented June 3 1919.

3 SHEETS-SHEET 2.

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- BY H15 flTTO/TNEYS UNITED STATES PATENT OFFICE.

NELS G. BK, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR T FOSSTON-CARPENTER COMPANY, OF ST. PAUL, MINNESOTA, A CORPORATION OF MINNESOTA.

GRAIN-STEVE.

Application filed September 29, 1917. Serial No. 193,940.

, T 0 all whom it may concern Be it known that I, New G. En, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Grain-Sieves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to fanning mills and is directed to the provision of simple and eificient means for imparting movements to the various reciprocating parts of the mill or machine. To the above ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims. 7

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring tothe drawings,

Figure 1 isa view in side elevation showing the improved fanning mill;

Fig. 2 is a vertical section taken from front to rear and centrally through the machine; I Fig, 3 is a front end elevation of the lower portion of themachine showing parts in the vicinity of the line marked 33 .on Fig. 1; "Fig. 1 is an enlarged section taken on the line4.4ofFig.l;and" 1 7 Fig. 5 is a transverse section taken on the line 55 of Fig. 1.

' The fanning mill comprises a suitable framework 6, an overhead feed*hoppe r 7,

an upper sieve-equipped shoe 8, a lowersieve-equipped shoe 9 and a fan made up of a casing 10 and fan head 11 working therein, all of which parts are, ormay be assumed to be, of the customary construction.

The upper shoe 8 is mounted for transverse vibratory movements and, as shown,

is suspended from the sides of the hopper 7 by yielding metal straps .12. This upper shoe also carries a gangof sieves 13, such as usually provided for the separation of the wheat and oats, the latter being tailed ofi while the wheat passes through the same and onto a screen sieve 1 1 that is carried by the lower shoe 9. The fan case 10 is open on that side that faces the sieves and is ar ranged to direct a blast of air against the said sieves in the usual way. The lower shoe 9 is mounted and reciprocated longitudinally of the machine and in the direction of the travel of the stock over the screen 14, and, as shown, it is thus mounted to slide between side boards 15 fixed to the frame 6 and to slide on transverse bars 16 rigidly secured to said side boards.

Mounted in suitable bearing brackets 17 on the frame 6 is a rock shaft 18 that has a pair of upwardly projecting arms 19 to which a head bar 20 is pivotally connected at its ends. This head bar 20 is adapted to aline with the upper transverse bar of the shoe 9 and it has a rigidly secured metallic plate 21, which, by a coupling pin 22 and cooperating cotter, is adapted to be coupled to the said shoe 9, as best shown in Fig. 2. Preferably, the coupling plate 21 is provided with upturned flanges 21 that lie close to, but out of contact with the side boards 15. A deflecting bar or narrow blade 23 has end lugs that are pivotally connected to the end flanges 21 at 24:.-

At one end, .(see Figsrl and 5), the rock shaft 18 is 'providedwith an upwardly projected arm 18 which, by'means of a long sprocket 27 which carries a. crank pin 28.

'Mounted on one side of the frame 6, and as shown, working in a slot 6? thereof, (see Fig;i1), isa bell crank 29. One arm of the :bell crank "29 is connected by a crank rod 30 ';(s'ee jFigs. land 2.) to a lug 31 on the far side] of-theiu-pper shoe 8, and the other arm of said 'bell crank is connected to one end of afpitman-orcrankrod 32, the'heador opposite end of which pitman 32 is mounted onrthe crank pin 28. A supplemental head 33 inthe form of a star-shaped metal plate is rigidly secured to the head of the pitman 32 and the upper and lower portions of this supplemental head are pivotally connected, respectively, to the lower end of a crank rod 3 1 and to the upper end of a crank 105 rod 34?. I

Working in the discharge opening of the hopper 7 is a pair of cooperating gates 35 and 36. The gate 35 has a shaft 35 that projects at one end and is provided with an Specification of Letters Patent. 2 Patented June 3, 1919,

provided with a crankdisk in the form of a arm 37 that is pivot-ally connected to the upper end of the crank rod 34. The shaft 36 of the gate 36 projects at one end and is provided with an arm 38, the head of which is engaged by an adjusting screw 39 that is swiveled in a bearing 40 on one side of the hopper 7. By adjustments of the screw 39, the gate 36 may be set vertically in different positions in respect to the free edge of the gate 35, so as to thereby regulate the amount or rate of flow of the grain from the hopper to the sieves. lVhen the machine is in operation, the gate 35 is vibrated so as to produce an agitation necessary to insure the continuous and even flow of the grain.

Receiving from the lower end of the scalping screen 14 is a transversely inclined discharge trough 41 that is hung for endwise vibratory movements on a pair of U- shaped hanger rods 42 and 43. These hanger rods 42 have a crank-like action,

their short arms being pivoted to strips on the sides of the trough and their long arms being pivoted in the adjacent corner posts of the frame 6. The long arm of the hanger rod or crank 43 has an arm 44 that is pivotally attached to the lower end of the above noted crank rod 34.

The machine shown is arranged to be driven by hand power, and hence, is provided with a large driving sprocket 45 loosely journaled on a shaft 46 that is held by brackets 47 on the sides of the hopper 7 This sprocket 45 is provided with an operating crank or handle 48, by means of which it may be rotated. A sprocket chain 49 runs over the sprocket 45 and over the small sprocket 27 of the fan shaft 11*. It will, of course, be understood that this machine may, if desired, be driven by an electrio motor or other power device. The salient feature of the invention resides in the simple and eflicient means for vibrating the sieves and various other moving parts.

Obviously, when the fan .is driven, either by hand power, or otherwise, the following movementswill be automatically transmitted, to wit, through the pitman 25, the lower sieve shoe 9 will be vibrated longitudinally of the machine; through the'pitman 32, the

upper shoe 8 will be vibrated transversely of the machine; through the crank rod 34, the vibratory feed gate '35 will be oscillated; and through the crank rod 35, the discharge trough 41 will be given an endwise vibratory movement which will insure the travel of the stock over the same and off from the discharge end thereof. Thus, all of the various moving parts of the machine are driven from the fan shaft, and moreover, three of the vibratory movements are transmitted from one crank, to wit, from the crank pin 28.

WVhat I claim is:

1. In a fanning mill, the combination with a fan having a shaft with a crank head at one end, of a vibratory sieve-equipped shoe, a vibratory feed device, a vibratory discharge trough, a pitman connected to said crank and to said shoe, and two connecting rods pivoted to the head of said pitman at points offset from the axis of the pivotal connection between said crank and pitman head, the one being connected to said feed device and the other to said trough, whereby said shoe, feed device and trough are vibrated from the single crank carried by the fan shaft.

2. In a fanning mill, the combination with upper and lower vibratory sieveequipped shoes, of a fan having a shaft with a crank at each end, a pitman at points offset from the axis of the pivotal connection between said crank and pit-man head connected to one of said cranks and to one of said shoes, a pitman connected to the other of said cranks and to the other of said shoes, a vibratory feed device, a vibratory discharge trough, and two crank rods pivoted to the head of said second noted pitman, one of said crank rods being connected to said feed device and the. other to said trough. 1

In testimony whereof I afiiX my signature in presence of two witnesses.

"NELS e-EK,

lVitnessesg;

. BERNICE G. BAUMANN,

HARRY D. KILcoRE.

Copies of this patent may be obtained. for'five cents each, by addressing the Commissioner of Patents,

Washington, D. C. I 

